The Robert Woodruff Photograph Collection (1900s-1970s) consists of ninety-seven black-and-white photographs of locations and events in Clark County, Nevada. Locations include Las Vegas, Henderson, and Searchlight, Nevada, as well as the Hoover Dam. The majority of the images were taken between 1934 and 1962.

Oral history interview with Edgar Fountain conducted by Julia Bragg on February 26, 1973 for the Ralph Roske Oral History Project on Early Las Vegas. Fountain discusses his career, the Boulder (Hoover) Dam, and the Democratic Party.

Oral history interview with Kathleen Fuson conducted by Lance Goss on March 04, 1980 for the Ralph Roske Oral History Project on Early Las Vegas. Fuson discusses her life in Las Vegas, Nevada including her employment history, her knowledge about the Boulder (Hoover) Dam, the desert’s flora and fauna, and the education system.

Oral history interview with Louise LeClair conducted by Dennis Luppens on March 21, 1978 for the Ralph Roske Oral History Project on Early Las Vegas. In this interview, LeClair talks about her family history in Nevada, and the flu epidemic of 1918. She specifically talks about Boulder (Hoover) Dam, Eldorado Fair, and how Las Vegas, Nevada has grown.

The L. F. Manis Photographs contain photographic prints, photographic slides, and photographic negatives depicting Southern Nevada from approximately 1900 to 1969, with a bulk of the materials dating from 1930 to 1940. The photographs primarily depict the construction, dedication, and various parts of the Hoover (Boulder) Dam, including the dam's upstream and downstream faces, intake towers, spillways, bridges, crest, outlet works, visitors' accommodations, and powerhouse. The photographs also depict Lake Mead, the reservoir created by the Hoover Dam, and the Colorado River, which is dammed by the Hoover Dam. The photographs also include views of desert landscapes in the Southwestern United States, including in Nevada, Arizona, and Southern California. Also depicted in the photographs are the cities of Las Vegas, Nevada and Boulder City, Nevada, including prominent buildings like hotels, casinos, government buildings, and train depots.

Oral history interview with Neil H. Holmes conducted by James Greene on January 14, 1975 for the Ralph Roske Oral History Project on Early Las Vegas. Holmes discusses the Boulder City, Nevada education system, family life, employment opportunities, housing, and the building of Boulder (Hoover) Dam.